High severity · published Mar 12, 2021
CVE-2021-27290
ssri 5.2.2-8.0.0, fixed in 8.0.1, processes SRIs using a regular expression which is vulnerable to a denial of service
7.5
CVSS
4.7%
EPSS
No
On KEV
Description
ssri 5.2.2-8.0.0, fixed in 8.0.1, processes SRIs using a regular expression which is vulnerable to a denial of service. Malicious SRIs could take an extremely long time to process, leading to denial of service. This issue only affects consumers using the strict option.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)4.7% · higher than 92% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
Graalvm · Oracle
20.3.3; 21.2.0 · source: NVD
SI
Sinec Infrastructure Network Services · Siemens
before 1.0.1.1 · source: NVD
SS
Ssri · Ssri Project
5.2.2 before 6.0.2; 7.0.0 before 8.0.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-27290
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-27290
Patch
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
Exploit
https://doyensec.com/resources/Doyensec_Advisory_ssri_redos.pdf
Exploit
https://github.com/yetingli/SaveResults/blob/main/pdf/ssri-redos.pdf
Product
https://npmjs.com
Patch
https://www.oracle.com/security-alerts/cpuoct2021.html
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